WebMCP Lets AI Agents Interact With Websites Without Leaving the Browser

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WebMCP is an experimental browser API that allows websites to expose tools directly to AI agents, enabling them to interact with a page without external scraping or separate server connections. Unlike traditional MCP, WebMCP operates within the browser context, requiring the relevant website to be open and the user to be authenticated where needed. ChatGPT has recently added support for WebMCP-based site tools in its built-in browser, signaling growing industry momentum behind the technology. A developer who presented WebMCP at AGNTCon and MCPCon Europe in front of over 2,000 attendees demonstrated the API using an interactive startup simulator that remains fully usable manually. According to a contributor working on the project, WebMCP is expected to reach reasonable stability in Chromium browsers around January or February 2026.

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